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Received: from mail.kernel.org ([198.145.29.99]) by bombadil.infradead.org with esmtps (Exim 4.94 #2 (Red Hat Linux)) id 1lefzf-0069ha-7n for linux-arm-kernel@lists.infradead.org; Thu, 06 May 2021 15:32:54 +0000 Received: by mail.kernel.org (Postfix) with ESMTPSA id EA209613F5; Thu, 6 May 2021 15:32:47 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1620315168; bh=u1gZ4iCJ8EZuBq5+caF8WVSL+jyHUTpCgbqmTBAr8V8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=oFxyk95u1LyOsMCxTvvj4v2FldyAmFLbYC+G5ZQUrf/8Oy6C4dBjQRshqVOcaJpa1 klQB3MKtwfzwXlRdVNPPoaWwfgzwpSAw4G70CyI2iDJnlcoe2+6b6eka574kPB8pzV Xx72qrVdMlzTcxcPycxRnXnPTk2Fc5s4V/MbLbQ7qEDTORl+/KEMs26dWYrfoXnds2 o72XlXW3fgi4p5CgxtAMtsYDOYuadBgvTpKNk39zm+GbdPz/QhsilUYN7hLp9J6nDD CKd2cu5Ch49OZbOAbRfSSVDxFSW2ifiT77d9s1eVsc2jmqLm3337CyRns3bRN1MZgX 0V1+ETSGO/hVg== Received: by pali.im (Postfix) id 819311208; Thu, 6 May 2021 17:32:46 +0200 (CEST) From: =?utf-8?q?Pali_Roh=C3=A1r?= To: Lorenzo Pieralisi , Thomas Petazzoni , Rob Herring , Bjorn Helgaas Cc: Russell King , =?utf-8?q?Marek_Beh=C3=BAn?= , Remi Pommarel , Xogium , Tomasz Maciej Nowak , Marc Zyngier , linux-pci@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Subject: [PATCH 09/42] PCI: aardvark: Fix PCIe Max Payload Size setting Date: Thu, 6 May 2021 17:31:20 +0200 Message-Id: <20210506153153.30454-10-pali@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20210506153153.30454-1-pali@kernel.org> References: <20210506153153.30454-1-pali@kernel.org> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210506_083251_393800_7BF03C5F X-CRM114-Status: GOOD ( 10.45 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Change PCIe Max Payload Size setting in PCIe Device Control register to 512 bytes to align with PCIe Link Initialization sequence as defined in Marvell Armada 3700 Functional Specification. According to the specification, maximal Max Payload Size supported by this device is 512 bytes. Without this kernel prints suspicious line: pci 0000:01:00.0: Upstream bridge's Max Payload Size set to 256 (was 16384, max 512) With this change it changes to: pci 0000:01:00.0: Upstream bridge's Max Payload Size set to 256 (was 512, max 512) Signed-off-by: Pali Rohár Reviewed-by: Marek Behún Cc: stable@vger.kernel.org --- drivers/pci/controller/pci-aardvark.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/pci/controller/pci-aardvark.c b/drivers/pci/controller/pci-aardvark.c index edeacd95297e..873efd79fffb 100644 --- a/drivers/pci/controller/pci-aardvark.c +++ b/drivers/pci/controller/pci-aardvark.c @@ -351,8 +351,9 @@ static void advk_pcie_setup_hw(struct advk_pcie *pcie) reg = advk_readl(pcie, PCIE_CORE_PCIEXP_CAP + PCI_EXP_DEVCTL); reg &= ~PCI_EXP_DEVCTL_RELAX_EN; reg &= ~PCI_EXP_DEVCTL_NOSNOOP_EN; + reg &= ~PCI_EXP_DEVCTL_PAYLOAD; reg &= ~PCI_EXP_DEVCTL_READRQ; - reg |= PCI_EXP_DEVCTL_PAYLOAD; /* Set max payload size */ + reg |= PCI_EXP_DEVCTL_PAYLOAD_512B; reg |= PCI_EXP_DEVCTL_READRQ_512B; advk_writel(pcie, reg, PCIE_CORE_PCIEXP_CAP + PCI_EXP_DEVCTL);